function and relation worksheet with answer key Worksheet on Relations and Functions. 2 1 represent relations and functions. 7. f (x) = x 8. h (x) = x + 7 9. g (x) = x - 2 10. g (x) = 3x 11. If f x 9x 9 and g x x 9 find f g 10 3. An ordered pair, commonly known as a point, has two components which are the x and y coordinates.